lock_page needs the caller to have a reference on the page->mapping inode
due to sync_page. Also lock_page_nosync is introduced which does not do a
sync_page via commit db37648cd6ce ("[PATCH] mm: non syncing lock_page()").
But commit 7eaceaccab5f ("block: remove per-queue plugging") kills off the
old plugging along with aops->sync_page() and lock_page_nosync. So there
is no need to have a reference on the page->mapping inode when calling
lock_page anymore. Remove this obsolete and confusing comment.
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
---
include/linux/pagemap.h | 3 ---
1 file changed, 3 deletions(-)
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 993994cd943a..8dfe8e49c427 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -908,9 +908,6 @@ static inline void folio_lock(struct folio *folio)
__folio_lock(folio);
}
-/*
- * lock_page may only be called if we have the page's inode pinned.
- */
static inline void lock_page(struct page *page)
{
struct folio *folio;
--
2.23.0
